Earmuffs 3M PELTOR H540A-411-SV

OPTIME III, double sleeve technology minimizes resonance in the holder housing, allowing for maximum high frequency attenuation, the audio link between the internal volume and the volume between the sleeves allows for maximum low frequency attenuation, the wide sealing contact line is filled with soft plastic foam for a comfortable fit. Sound attenuation of 35 dB. Suitable for extremely noisy environments.